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If x=r sin theta cos phi , y=rsin theta ...

If x=`r sin theta cos phi , y=rsin theta sin phi and z=r costheta ` then the value of `sqrt(x^2+y^2+z^2)` will be

A

`cos theta`

B

`-r`

C

r

D

`cos phi`

Text Solution

Verified by Experts

The correct Answer is:
C
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CHHAYA PUBLICATION-TRIGONOMETRIC RATIOS [OR FUNCTIONS] OF POSITIVE ACUTE ANGLES-Sample Questions for Competitive Exams
  1. If x=r sin theta cos phi , y=rsin theta sin phi and z=r costheta then...

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